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-rw-r--r--src/corelib/io/qiodevice.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/corelib/io/qiodevice.cpp b/src/corelib/io/qiodevice.cpp
index f83c142..f2cef4e1 100644
--- a/src/corelib/io/qiodevice.cpp
+++ b/src/corelib/io/qiodevice.cpp
@@ -755,6 +755,7 @@ qint64 QIODevice::bytesToWrite() const
qint64 QIODevice::read(char *data, qint64 maxSize)
{
Q_D(QIODevice);
+ CHECK_READABLE(read, qint64(-1));
#if defined QIODEVICE_DEBUG
printf("%p QIODevice::read(%p, %d), d->pos = %d, d->buffer.size() = %d\n",